Finding the Fourth Proportional to 105,870.35, 146,101.17 and 57,472.23

Step by Step Solution

1. Step 1: Write the proportion equation
   105,870.35 : 146,101.17 = 57,472.23 : x
2. Step 2: Convert to fraction form
   105,870.35/146,101.17 = 57,472.23/x
3. Step 3: Cross multiply
   105,870.35x = 146,101.17 × 57,472.23
4. Step 4: Simplify right side
   105,870.35x = 8,396,760,045.51
5. Step 5: Solve for x
   x = 8,396,760,045.51/105,870.35
6. Step 6: Final answer
   x = 79,311.73